Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/aptdaemon/errors.py", line 198, in _convert_dbus_exception
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/aptdaemon/client.py", line 777, in cancel
    self._iface.Cancel(reply_handler=reply_handler,
  File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 141, in __call__
    return self._connection.call_blocking(self._named_service,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/dbus/connection.py", line 634, in call_blocking
    reply_message = self.send_message_with_reply_and_block(
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
dbus.exceptions.DBusException: org.debian.apt: Could not cancel transaction

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/aptdaemon/gtk3widgets.py", line 456, in _on_clicked
    transaction.cancel()
  File "/usr/lib/python3/dist-packages/defer/utils.py", line 107, in _deferable
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/aptdaemon/errors.py", line 200, in _convert_dbus_exception
    raise get_native_exception(error)
aptdaemon.errors.AptDaemonError: org.debian.apt: Could not cancel transaction